English version

Ordnance Survey map in Geography topic

From Longman Dictionary of Contemporary EnglishOrdnance Survey mapˌOrdnance ˈSurvey ˌmap noun [countable] British English  SGa map which shows all the roads, paths, hills etc of an area in detail
Examples from the Corpus
Ordnance Survey mapLorton paused to consult his Ordnance Survey map.Filling a substantial amount of skyline and covering six full squares of the Ordnance Survey map.